UMA metrics for use count of wheel and touch scrolls.

content/renderer/gpu/render_widget_compositor_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/gpu/render_widget_compositor.h"
 
 #include <utility>
 
 #include "base/location.h"
 #include "base/macros.h"
@@ skipping 24 matching lines @@
 
 class StubRenderWidgetCompositorDelegate
     : public RenderWidgetCompositorDelegate {
  public:
   // RenderWidgetCompositorDelegate implementation.
   void ApplyViewportDeltas(const gfx::Vector2dF& inner_delta,
                            const gfx::Vector2dF& outer_delta,
                            const gfx::Vector2dF& elastic_overscroll_delta,
                            float page_scale,
                            float top_controls_delta) override {}
+  void RecordWheelAndTouchScrollingCount(bool has_scrolled_by_wheel,
+                                         bool has_scrolled_by_touch) override {}
   void BeginMainFrame(double frame_time_sec) override {}
   void RequestNewCompositorFrameSink(
       bool fallback,
       const CompositorFrameSinkCallback& callback) override {
     callback.Run(nullptr);
   }
   void DidCommitAndDrawCompositorFrame() override {}
   void DidCommitCompositorFrame() override {}
   void DidCompletePageScaleAnimation() override {}
   void DidReceiveCompositorFrameAck() override {}
@@ skipping 249 matching lines @@
 
 TEST_F(RenderWidgetCompositorFrameSinkTest, FallbackSuccessNormalSuccess) {
   // The first success is a fallback, but the next should not be a fallback.
   RunTest(false,
           RenderWidgetCompositor::COMPOSITOR_FRAME_SINK_RETRIES_BEFORE_FALLBACK,
           1, 1);
 }
 
 }  // namespace
 }  // namespace content